Fix the QML test compilation - VPN-1701 (#2700)

tests/qml/qml.pro

@@ -1,16 +1,20 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
 TEMPLATE = app
 TARGET = qml_tests
 
 QT += quick
+QT += widgets
 
 CONFIG += warn_on qmltestcase
 CONFIG += c++1z
+
 # Allows us to be a supported platform
 DEFINES += UNIT_TEST
 DEFINES += MVPN_DUMMY
+
 # Sets up app and build id which we test for in test_VPNAboutUs
 DEFINES += APP_VERSION=\\\"QMLTest_AppVersion\\\"
 DEFINES += BUILD_ID=\\\"QMLTest_BuildID\\\"